Dennis, I use both with SMF's..I prefer to use the G70 for Smf's..I can read lyrics, use markers, and have a chord read available with the G70..I also have the cover tools available..The harmonizer is also available with SMF's[G70]..

Mostly my laptop is for MP3's..although special request are available on the laptop[over 100,000 SMF's]..
There is no need for set list with the laptop..I use VanBasco player that selects SMF's from the explorer window..Using Cakewalk etc is a waste of time...No need to make set lists..
My Laptop also runs WinAmp for MP3 and wave files...Aboard is also KaraWin Pro software..this allows me to change keys on MP3, wave and SMF tunes in real time..

I also use a higher quality soft synth[VST/DXI] for sound source..Now I have the Sonic Cell plug in for playback sounds..

Overall you can't beat a laptop that is set up properly..